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A068622 a(1) = 5; a(n+1) = smallest triangular number > a(n) formed by adding at least one digit to a(n). 4
5, 15, 105, 1035, 103285, 10832185, 1083241785, 1087326541785, 108703236544918785, 108870232356544491187785 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

From a(3) onwards the sequence is A068618.

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Cf. A068618, A068619, A068621, A068623, A068624.

Sequence in context: A268565 A121869 A118412 * A080449 A077702 A088418

Adjacent sequences:  A068619 A068620 A068621 * A068623 A068624 A068625

KEYWORD

base,hard,more,nonn

AUTHOR

Amarnath Murthy, Feb 25 2002

EXTENSIONS

a(6)-a(9) from Max Alekseyev, Apr 21 2009

a(10) from Max Alekseyev, Jan 01 2014

STATUS

approved

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Last modified May 22 19:19 EDT 2019. Contains 323481 sequences. (Running on oeis4.)